One vertex per element, one color per generator, with an edge from x to x·s.
(2,6)(3,4)(17,18)(19,24)(20,25)(21,23)(22,27)(26,29)(28,30)(31,32) involution — undirected(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,19,20,27)(18,22,25,24)(21,28,29,32)(23,31,26,30)(1,3,5,4)(2,7,6,8)(10,13)(11,15)(18,23)(19,27)(21,29)(22,30)(24,31)(25,26)(2,6)(7,8)(9,11,12,15)(10,14,13,16)(17,19)(18,24)(20,27)(21,28)(22,25)(23,30)(26,31)(29,32)(1,4,5,3)(2,8,6,7)(10,13)(14,16)(19,27)(22,24)(28,32)(30,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.